High-intensity attosecond pulse generation by using inhomogeneous laser field in frequency and space

被引：5
|
作者：
Feng, Liqiang [1 ,2 ]
Li, Wenliang [2 ,3 ]
Castle, Rich-Samuel [1 ]
Li, Yi [1 ,3 ]
机构：
[1] Liaoning Univ Technol, Lab Modern Phys, Jinzhou 121001, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
[3] Xinjiang Inst Engn, Dept Phys, Urumqi 830091, Peoples R China
来源：
JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS | 2017年 / 26卷 / 03期
基金：
中国国家自然科学基金;
关键词：
High-order harmonic generation; attosecond pulse generation; frequency modulation of the laser; space modulation of the laser; HIGH-HARMONIC-GENERATION; NONLINEAR OPTICS; CHIRPED-PULSE; ENHANCEMENT;
D O I：
10.1142/S0218863517500345
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
High-order harmonic spectra and attosecond source generation from Ar atom driven by the inhomogeneous laser field in frequency and space have been theoretically investigated. The results showed that (i) for the case of the frequency modulation of the laser, the harmonic cutor can be remarkably extended with the introduction of the chirp of the laser field, (ii) for the case of the space modulation of the laser, the harmonic cutoff can be further extended by using the positive spatial inhomogeneous field, (iii) by properly adding a terahertz controlling field, the intensity of the harmonic yield can be enhanced by 2 orders of magnitude, showing a 775 eV supercontinuum. As a result, five isolated attosecond pulses (IAPs) from 60 as to 22 as can be obtained.
引用
收藏
页数：14
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